IEEE C802.16m-09/2513
Project
IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>
Title
Interference measurements with Relays (15.3.6.5.2.11)
Date
Submitted
2009-11-06
Source(s)
Alexander Maltsev
Alexei Davydov
Andrey Pudeyev
Vadim Sergeyev
Jerry Sydir
Alexey Khoryaev
alexander.maltsev@intel.com
jerry.sydir@intel.com
*<http://standards.ieee.org/faqs/affiliatio
nFAQ.html>
Intel Corporation
Re:
Comments on IEEE P802.16m/D2 for IEEE 802.16 Working Group Letter Ballot Recirc
#30a
Abstract
This contribution proposes modifications to the P802.16m/D2 text that allow AMSs to
perform separate CQI measurements in Access and Relay zone of the frame for system
supporting relay stations.
Purpose
To be discussed and adopted by TGm for P802.16m/D3
Notice
Release
Patent
Policy
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1
IEEE C802.16m-09/2513
Interference measurements with Relays
Alexander Maltsev, Alexei Davydov, Andrey Pudeyev, Vadim Sergeyev, Jerry Sydir, Alexey
Khoryaev
Intel Corporation
Motivation
This contribution proposes modifications to the P802.16m/D2 [1] text that allow AMSs to
perform separate measurements of CQI in Access and Relay zone of the frame.
Operation of the system with Relay stations in accordance with the Relay frame format defined
in [2] creates different interference levels in the Access and the Relay zones of frames. Therefore
to perform accurate CQI measurements AMSs should treat the Access and Relay zones
separately. Separate CQI reports for Access and Relay zones may also be used by the ABS
scheduler to increase the cell throughput through adaptive scheduling of AMSs to Access or
Relay zones. However, currently specified messages requesting CQI repots do not incorporate
indication of the zone where the CQI should be measured.
SF#0
SF#1
SF#2
Access Zone
SF#3
Relay Zone
Average
interference
level for an
AMS
Time
Figure 1. Example of DL interference environment seen by an AMS in the Access and the Relay
zones.
To remove this limitation we propose to introduce Measurement Zone bit in the Feedback
Allocation A-MAP IE to indicate in which zone (Access or Rely) the CQI should be measured.
An AMS reading the Measurement Zone bit should measure the CQI only in the zone indicated
by the bit. If periodic feedback is requested, the AMS should use the zone indicated by the
Measurement Zone bit for generating each feedback report in the series.
If the ABS further wants the AMS to send feedback for another zone it should send another
Feedback Allocation A-MAP IE with the Measurement Zone bit set or cleared in accordance
with the desired zone.
References
[1] IEEE P802.16m/D2, “Part 16: Air Interface for Fixed and Mobile Broadband Wireless
Access Systems – DRAFT Amendment to IEEE Standard for Local and metropolitan area
networks”
[2] IEEE 802.16m-09/0034, “IEEE 802.16m System Description Document”
------------------------------- Text Start --------------------------------------------------2
IEEE C802.16m-09/2513
[Modify the Table 818 in the subclause 15.3.6.5.2.11 as follows (page 392):]
Table 818—Feedback Allocation A-MAP IE
Syntax
Feedback-Allocation-MAP_IE() {
A-MAP IE Type
Channel Index
Size (bit)
Notes
[4]
Variable
Feedback Allocation A-MAP IE = 0b0010
Feedback channel index within the UL fast
feedback control resource region (Dependent on
LFB,FPi defined in 15.3.8.3.3.2)
0b0: Feedback shall be measured in the Access
zone
0b1: Feedback shall be measured in the Relay
zone
A feedback is transmitted on the FBCH every 2p
frames
A long-term feedback is transmitted on the
FBCH every 2q short-term feedback
opportunities.
If q = 0b00, long-term feedback is not used.
The AMS starts reporting at the frame of which
the number has the same 3 LSB as the specified
frame offset. If the current frame is specified,
the AMS should start reporting in eight frames.
An FBCH is transmitted on the FBCH channels
indexed by Channel Index for 8×2d frames.
If d = 0b000, the FBCH is deallocated.
If d = 0b111, the AMS should report until the
ABS command for the AMS to stop.
Indicated if one ACK channel is allocated
Measurement Zone
[1]
Short-term feedback period (p)
[3]
Long-term feedback Period (q)
[2]
Frame offset
[3]
Allocation Duration(d)
[3]
ACK allocation flag
If ( ACK allocation flag == 0b1 ) {
HFA
[1]
}
MaxMt
MFM
If (MFM = 2,3,5,6) {
Feedback Format
}
If (MFM = 0,1,4,7) {
FPI
}
If (MFM = 0,1 & long term feedback
period != 0b00{
Long term FPI
[3]
HARQ feedback channel allocation for
Feedback Channel De-allocation confirmation
Variable [1-2]
Variable number of bits - depends on number of
transmit antenna Nt
If Nt=2: (SU-MIMO and MU-MIMO) 0b0: 1
0b1: 2
If Nt=4: (SU-MIMO and MU-MIMO) 0b00: 1
0b01: 2 0b10: 3 0b11: 4
If Nt=8 (SU-MIMO) 0b000: 1 0b001: 2 0b011:
4 0b111: 8
If Nt=8: (MU-MIMO) 0b00: 1 0b01: 2 0b10: 3
0b11: 4
MIMO Feedback Mode as defined in Table 671
[3]
[2]
[2]
Frequency partition indication: ABS indicate
AMS to send wideband CQI and STC rate of
the frequency partition and reuse factor in the
future:
0b00: Frequency partition index 0
0b01: Frequency partition index 1
0b10: Frequency partition index 2
0b11: Frequency partition index 3
[2]
Frequency partition indication: ABS indicate
AMS to send wideband CQI and STC rate for
the second frequency partition
using long term feedback:
0b00: Frequency partition index 0
0b01: Frequency partition index 1
0b10: Frequency partition index 2
3
IEEE C802.16m-09/2513
0b11: Frequency partition index 3
}
If (MFM == 3,4,6,7) {
CM
CS
}
If(MFM==0,1,2,5) {
Measurement Method Indication
}
Padding
MCRC
CL SU and MU MIMO
Codebook Feedback Mode and Codebook
Coordination Enable 0b00: standard with CCE
disabled 0b01: transformation with CCE
disabled 0b10: differential with CCE disabled
0b11: standard with CCE enabled
Codebook subset
[2]
[1]
[1]
0b0: Use the midamble for CQI measurements
0b1: Use pilots in OL region with MaxMt
streams for CQI measurements
Variable
[16]
Padding to reach byte boundary
16 bit CRC masked by Station ID
}
[Insert the following text after the Table 818:]
Measurement Zone: a one-bit field indicating the zone where the feedback information shall be
measured. The value of 0 requests the feedback report for the Access Zone of a frame; the value
of 1 requests the feedback report for the Relay Zone of a frame.
------------------------------- Text End ---------------------------------------------------
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